3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek/*
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * CDDL HEADER START
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek *
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * The contents of this file are subject to the terms of the
752712d2f9cd86c93a73092d044dfd3096037d74lling * Common Development and Distribution License (the "License").
752712d2f9cd86c93a73092d044dfd3096037d74lling * You may not use this file except in compliance with the License.
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek *
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * or http://www.opensolaris.org/os/licensing.
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * See the License for the specific language governing permissions
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * and limitations under the License.
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek *
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * When distributing Covered Code, include this CDDL HEADER in each
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * If applicable, add the following below this CDDL HEADER, with the
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * fields enclosed by brackets "[]" replaced with your own identifying
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * information: Portions Copyright [yyyy] [name of copyright owner]
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek *
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * CDDL HEADER END
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek */
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek/*
fa94a07fd0519b8abfd871ad8fe60e6bebe1e2bbbrendan * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * Use is subject to license terms.
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek */
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek#pragma ident "%Z%%M% %I% %E% SMI"
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek/*
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * Attempt to dynamically link in the ZFS libzfs.so.1 so that we can
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * see if there are any ZFS zpools on any of the slices.
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek */
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek#include <stdlib.h>
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek#include <stdio.h>
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek#include <strings.h>
752712d2f9cd86c93a73092d044dfd3096037d74lling#include <unistd.h>
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek#include <sys/param.h>
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek#include <sys/errno.h>
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek#include <sys/types.h>
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek#include <sys/stat.h>
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek#include <fcntl.h>
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek#include <thread.h>
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek#include <synch.h>
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek#include <dlfcn.h>
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek#include <link.h>
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek#include <ctype.h>
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock#include <sys/fs/zfs.h>
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek
99653d4ee642c6528e88224f12409a5f23060994eschrock#include <libzfs.h>
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek#include "libdiskmgt.h"
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek#include "disks_private.h"
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek/*
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * Pointers to libzfs.so functions that we dynamically resolve.
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek */
99653d4ee642c6528e88224f12409a5f23060994eschrockstatic int (*zfsdl_zpool_in_use)(libzfs_handle_t *hdl, int fd,
99653d4ee642c6528e88224f12409a5f23060994eschrock pool_state_t *state, char **name, boolean_t *);
99653d4ee642c6528e88224f12409a5f23060994eschrockstatic libzfs_handle_t *(*zfsdl_libzfs_init)(boolean_t);
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinekstatic mutex_t init_lock = DEFAULTMUTEX;
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinekstatic rwlock_t zpool_lock = DEFAULTRWLOCK;
99653d4ee642c6528e88224f12409a5f23060994eschrockstatic boolean_t initialized;
99653d4ee642c6528e88224f12409a5f23060994eschrockstatic libzfs_handle_t *zfs_hdl;
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinekstatic void *init_zpool();
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrockstatic int
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrockinuse_zpool_common(char *slice, nvlist_t *attrs, int *errp, char *type)
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek{
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek int found = 0;
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock char *name;
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek int fd;
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock pool_state_t state;
99653d4ee642c6528e88224f12409a5f23060994eschrock boolean_t used;
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek *errp = 0;
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek if (slice == NULL) {
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek return (found);
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek }
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek (void) mutex_lock(&init_lock);
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek /*
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * Dynamically load libzfs
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek */
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek if (!initialized) {
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek if (!init_zpool()) {
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek (void) mutex_unlock(&init_lock);
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek return (found);
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek }
99653d4ee642c6528e88224f12409a5f23060994eschrock initialized = B_TRUE;
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek }
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek (void) mutex_unlock(&init_lock);
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek (void) rw_rdlock(&zpool_lock);
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek if ((fd = open(slice, O_RDONLY)) > 0) {
99653d4ee642c6528e88224f12409a5f23060994eschrock name = NULL;
99653d4ee642c6528e88224f12409a5f23060994eschrock if (zfsdl_zpool_in_use(zfs_hdl, fd, &state,
99653d4ee642c6528e88224f12409a5f23060994eschrock &name, &used) == 0 && used) {
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock if (strcmp(type, DM_USE_ACTIVE_ZPOOL) == 0) {
99653d4ee642c6528e88224f12409a5f23060994eschrock if (state == POOL_STATE_ACTIVE) {
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock found = 1;
99653d4ee642c6528e88224f12409a5f23060994eschrock } else if (state == POOL_STATE_SPARE) {
99653d4ee642c6528e88224f12409a5f23060994eschrock found = 1;
99653d4ee642c6528e88224f12409a5f23060994eschrock type = DM_USE_SPARE_ZPOOL;
fa94a07fd0519b8abfd871ad8fe60e6bebe1e2bbbrendan } else if (state == POOL_STATE_L2CACHE) {
fa94a07fd0519b8abfd871ad8fe60e6bebe1e2bbbrendan found = 1;
fa94a07fd0519b8abfd871ad8fe60e6bebe1e2bbbrendan type = DM_USE_L2CACHE_ZPOOL;
99653d4ee642c6528e88224f12409a5f23060994eschrock }
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock } else {
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock found = 1;
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock }
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock if (found) {
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock libdiskmgt_add_str(attrs, DM_USED_BY,
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock type, errp);
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock libdiskmgt_add_str(attrs, DM_USED_NAME,
99653d4ee642c6528e88224f12409a5f23060994eschrock name, errp);
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock }
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek }
99653d4ee642c6528e88224f12409a5f23060994eschrock if (name)
99653d4ee642c6528e88224f12409a5f23060994eschrock free(name);
752712d2f9cd86c93a73092d044dfd3096037d74lling (void) close(fd);
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek }
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek (void) rw_unlock(&zpool_lock);
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek return (found);
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek}
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrockint
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrockinuse_active_zpool(char *slice, nvlist_t *attrs, int *errp)
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock{
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock return (inuse_zpool_common(slice, attrs, errp, DM_USE_ACTIVE_ZPOOL));
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock}
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrockint
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrockinuse_exported_zpool(char *slice, nvlist_t *attrs, int *errp)
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock{
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock return (inuse_zpool_common(slice, attrs, errp, DM_USE_EXPORTED_ZPOOL));
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock}
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek/*
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * Try to dynamically link the zfs functions we need.
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek */
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinekstatic void*
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinekinit_zpool()
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek{
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek void *lh = NULL;
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek if ((lh = dlopen("libzfs.so", RTLD_NOW)) == NULL) {
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek return (lh);
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek }
99653d4ee642c6528e88224f12409a5f23060994eschrock
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek /*
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * Instantiate the functions needed to get zpool configuration
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek * data
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek */
99653d4ee642c6528e88224f12409a5f23060994eschrock if ((zfsdl_libzfs_init = (libzfs_handle_t *(*)(boolean_t))
99653d4ee642c6528e88224f12409a5f23060994eschrock dlsym(lh, "libzfs_init")) == NULL ||
99653d4ee642c6528e88224f12409a5f23060994eschrock (zfsdl_zpool_in_use = (int (*)(libzfs_handle_t *, int,
99653d4ee642c6528e88224f12409a5f23060994eschrock pool_state_t *, char **, boolean_t *))
46a2abf27af40eda17a3f97e79eda1aef4e3c3c8eschrock dlsym(lh, "zpool_in_use")) == NULL) {
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek (void) dlclose(lh);
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek return (NULL);
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek }
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek
99653d4ee642c6528e88224f12409a5f23060994eschrock if ((zfs_hdl = (*zfsdl_libzfs_init)(B_FALSE)) == NULL) {
99653d4ee642c6528e88224f12409a5f23060994eschrock (void) dlclose(lh);
99653d4ee642c6528e88224f12409a5f23060994eschrock return (NULL);
99653d4ee642c6528e88224f12409a5f23060994eschrock }
99653d4ee642c6528e88224f12409a5f23060994eschrock
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek return (lh);
3e1bd7a2aaeb6188caef90679b98088cfef1edc6sjelinek}